She could still be going out though.
I'm obviously not explaining very well here.
Did she ask to be weaned onto crap- no
Is it her fault this was all she got and got used to or maybe even addicted to sugar and junk etc- no
Would she have chosen to be like she is- no
Should parents have done something about it years ago/ of bloody course. And shame on them for not doing so.
And yes of course they have clearly messed up her relationship with food and making good choices.
But an eleven yr old may be in a position at times where they make choices with their behaviour. Like sneaking or lying. And if she is lying about what she's eaten or that she's spending money on stuff when she's been told no, then those are things that the parents may not be able to help.
Some kids are pretty determined. The parents (if they are trying to do anything, which we don't know) obviously need to step up the game big time. And perhaps they don't even care who knows, but there are often threads where people and understand why their children are gaining weight and even hen they write down a typical day it can be hard to see where it could be from, until they divulge that their kids can climb up to cupboards or sneak down in the middle of the night.
Now obviously as someone did mention, it's not all down to a bottle of fizzy drink and a chocolate bar they bought down the shop but it won't help, and if done often enough these things can add up to quite a significant amount of extra food and drink.
It's really sad that this wasn't dealt with when it first became a problem because it would have been far easier to do at 4/5/6 than at 11 when they have the freedom possibly the money and the mental capacity to be able to find ways of getting what they want.